BLACK-CROWNED NIGHT HERON. 

 Spring migration. 



63 



Number 

 of years' 

 records. 



Average 

 date of 

 spring 

 arrival. 



Earliest date 

 of spring 

 arrival. 



Philadelphia, Pa. (near) 



Morristown, N. J 



New Providence, N.J 



New York N. Y. (near) 



Hartford, Conn 



Providence, R. I 



Southeastern Massachusetts. 



Monadnock, N. H 



Portland, Me 



Quebec City, Canada 



Rodney, Miss 



St. Louis, Mo 



Urbana,Ul 



Rockford,Ill 



Chicago, Ul 



Sandusky, Ohio 



Ottawa, Ontario 



Grinnell, Iowa 



Forest City, Iowa 



Heron Lake, Minn 



East-central Kansas 



Eastern Nebraska 



Larimore, N. Dak 



Denver, Colo, (near) 



Apr. 22 

 Apr. 22 

 Apr. 10 

 Apr. 16 

 Apr. 9 

 Apr. 6 

 Apr. 24 



Apr. 14 

 Mar. 24 

 Apr. 22 

 Mar. 31 



Apr. 23 

 Apr. 16 

 Apr. 24 

 Apr. 17 



Apr. 12 

 Apr. 19 

 Apr. 22 



5 Apr. 25 



Feb. 15,1902 

 Apr. 19,1885 

 Mar. 23,1884 

 Mar. 4,1895 

 Mar. 28,1902 

 Mar. 17,1907 

 Mar. 28,1893 

 Apr. 11,1902 

 Apr. 18,1906 

 Apr. 10,1905 

 Mar. 22,1884 

 Apr. 20,1886 

 Mar. 26,1904 

 Apr. 5,1890 

 Apr. 8,1894 

 Apr. 14,1902 

 Apr. 18,1894 

 Apr. 8,1887 

 Apr. 3,1897 

 Apr. 6,1890 

 Apr. 15,1907 

 Apr. 2,1904 

 May 1,1893 

 Apr. 21,1906 



As would be expected from a species with such an extended range, 

 the eggs are deposited at widely different times in different parts of 

 the breeding range. While eggs are most commonly found in Chile 

 during the months of October and November (Germain), in Cuba, 

 the eggs are usually deposited in April and May (Gundlach) ; San 

 Mateo, Fla., March 29, 1882 (specimens in U. S. National Museum) ; 

 Alachua County, Fla., April 18, 1890 (Pearson) ; Charleston, S. C, 

 April 25, 1908 (Wayne) ; Charleston, S. C, April 7, 1910 (Wayne) 

 (unusually early) ; Mattamuskeet Lake, N. C, April 30, 1908 (Pear- 

 son) ; Baltimore, Md., April 30, 1892 (Gray) ; Syracuse, N. Y., May 

 14, 1881 (Eich) ; Portland, Conn., April 17, 1872 (Merriam) ; Essex 

 County, Mass., May 12, 1896 (Mann) ; Penobscot Bay, Me., May 26, 

 1897 (Knight) ; Philo, 111., May 12, 1902 (Hess) ; Manawa Lake, 

 Iowa, May 15, 1904 (Trostler) ; near San Francisco, Cal., April 21, 

 1904 (Finley). 



Eggs were just hatching April 13, 1895, at Tallahassee, Fla., which 

 must have been laid in March (Williams) ; young just out of the 

 nest June 20, 1903, at Falmouth, Me. (Norton) ; young in nest Sep- 

 tember 15, 1901, at Alameda, Cal. (Cohen) ; full-grown young April 

 23, 1878, at Lomita, Tex. (Sennett). The average date of finding 

 eggs at Barr Lake, Colo., was May 12, earliest May 9, 1909, but 

 young in nest May 24, 1907, indicated that some eggs had been laid 

 at a still earlier date (Kockwell). 



